In the ongoing chlamydia epidemic, improving contact tracing is a priority. The aim of this research was to develop and evaluate contact tracing resources for chlamydial infection. We compared contact tracing outcomes before and during an intervention using information resources in the form of a wallet-sized ‘Make Contact’ card and a website. The notification index was similar in the pre-intervention phase and the intervention phase (1.83 versus 1.91, P = 0.74), as was the treatment index (0.94 versus 0.91, P = 0.89). Although the intervention did not demonstrate an effect, this study adds to the published data on contact tracing outcomes in Australia. Further research to evaluate contact tracing strategies, both in sexual health clinics and other settings, remains a priority.